中继多播协议（Relayed multicast protocol，RMCP）是一种用于实现中继多播数据传输方案的协议。与传统的IP多播不同，RMCP可以通过中间端主机配置一条中继多播路径，使多播流量流动。RMCP可以应用于当前基于单播的IP网络，其中IP多播尚未完全部署。 ISO/IEC 16512-1:2016阐述了为中继多播指定RMCP所需的基本概念。它定义了相关术语，并为后续协议的未来开发提出了框架。该框架涵盖网络拓扑，包括网络实体及其关系、服务场景、基本操作和消息格式。

Relayed multicast protocol (RMCP) is a protocol which is used to realize a relayed multicast data transport scheme. Different from the conventional IP multicast, RMCP can configure a relayed multicast path that multicast traffic flows by using intermediate end-hosts. RMCP can be applied to the current unicast based IP network where IP multicast is not fully deployed. ISO/IEC 16512-1:2016 addresses the basic concepts needed to specify RMCP for relayed multicast. It defines the related terminology and proposes a framework for the future development of subsequent protocols. The framework covers network topology including network entities and the relationship among them, service scenarios, basic operations, and message format.